01: /*
02: * Copyright 1999-2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: /*
17: * $Id: String.java,v 1.8 2004/08/17 19:25:41 jycli Exp $
18: */
19: package org.apache.xpath.operations;
20:
21: import org.apache.xpath.objects.XObject;
22: import org.apache.xpath.objects.XString;
23:
24: /**
25: * The 'string()' operation expression executer.
26: */
27: public class String extends UnaryOperation {
28: static final long serialVersionUID = 2973374377453022888L;
29:
30: /**
31: * Apply the operation to two operands, and return the result.
32: *
33: *
34: * @param right non-null reference to the evaluated right operand.
35: *
36: * @return non-null reference to the XObject that represents the result of the operation.
37: *
38: * @throws javax.xml.transform.TransformerException
39: */
40: public XObject operate(XObject right)
41: throws javax.xml.transform.TransformerException {
42: return (XString) right.xstr(); // semi-safe cast.
43: }
44: }
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